Belt-sander.



. C. L.-M ATT|SON.

B'E LT SANDERf- APPLICATION r'uen was. Ms.

Patented Nov, 2, 1915.

2 SHEETS-SHEET 2,;

Be'it knownthat 1,1 CARD-LAWRENCE MAT -;1 ISOX, 21 citizen of the United States; resid- .i'ngz at"; Beloit, i 1 the vcounty "State of lVisccn'sin; have invented certain new and useful. Improvements in Belt-Sand; ers', ofwhich the following is a specification relates" to "sand-paperi-nga'nd polishingmachines ofthe type in which the abrasive is carried To all it my concern of. Rock andmeans-ofla hand block manipulatedby the operator.

Onfe ofthe objects of thejinvention is to 7 provide a frame constructed of independent a vsections arranged to be venient distance apart of any} desired length may be sanded.

placed at any conin order-that pieces.

Another object of the invention relates to 26' theproperlocation of the belt;

1 with thework, the upper h located that the operators'head was liable to '25- ,of the belt at such a that shall-be out offtheway of the oner-- Inpre'vious machines in 'which the lower run of the belt is manipulated into contact run has been so;

come into contact therewith, .I have: provided means for supporting'theupper run height from the floor I ator.

3,0 prove the construction of'the tables'used in this cla'ssof machine.

'A, further object of the im'ention'is to int In-the accompanying drawings, Figure 1 vis a front elevation of a belt sander embody ing the -features'of my invention. Fig. 2 is a topplan view of the machine. I 3 is an end elevation of the table. -'Fig. 4: is ayiew fa- Zhand block that may be'used with the machine; I

In machines dle material of" anyllength; 1 1, therefore, construct the frame of the machmeof two pedestals'l and which are structurally inprovided with bearings dependent one ofthe other, each pedestal having a base adapted to rest firmli' upon and be secured to the floor. These pedestals may be placed upon-the floor at any distance apart in order that work of any-length may be placed between them;

upon an endless belt,' thefbelt-"being pressed-against the-*wor.k'by

' operators head is; not likely to tea; Allr'partsjof the levs; I

- the connecting .member each of said rails being of this class it": is. desirable that-the machine shall'be expansible to hanw tsc'onsm} Assmnon-ro c; meniscumea time Won xs, or p Lo1T,;-,w;scons m; A; conronacrron, or wlsconsln,

m-ewe i respectii'ely 1' Each otrthe pedestals also has anupwardl-y extending arm or bracket 91and -10, respectively; The bracket 9. carriesian' idler-pulley =11 Alever 12 otthefirst order is-pivoted'to the bracket '10, Upon'the' inner end of the pulley ofthe'1ever12 is :an adjustable weight 1a.;

" An endless,-be'lt ;15extends aroundthe ub belt downwardly against the work with his arm inclined down-ward-lyat a comfort-able lever 12,- is journaled an idler." 13, and at "the opposite end i-portion .leys' 7 '8 *,11 and-13; I The pulleys .7 and 8 are. located. at such a height; fromlatheifloor. that the operator canpress the lower run o fxthe- I Specification of Letters Patent. Patented'Nolm'g1915Q 'hapiicationnledluly'it, 1913. Seria1No.7 77,5 18.

and-convenient angle andlwithout assuming a an unnatural position. The 'pulleysg-fl' and 13 a'1'esupportedatsuch a height that the.

come into accidental contact withgthe upper run of the belt beingabove the work, there are no obstructions-to interfere .with lowering the table, as much as may be necessaryto take work of unusual thickness. The, sandpaper; or other abrasive material is located upon' the outer side of the belt. that is" to say, theiside oppositetothat which is in contact with the pulley, the "abPasiVeYbeng thus ablefto clear itself of dust to a. considerable degl 'eei as it passes around the pul- The .work i's'suppoifted upon atable which is structurally independent of the pedestals 1 and'2. -The supporting frame of the table comprises two end members lfi'and' 17 and are adapted torun upon t'worails 22 and 23, secured'to a slide 24; 24 are mounted for (Fig. 3). The slides dove-tail guides 25 vertical moyement upon naled in hearings in the end members 1-6 and 17' and the connecting member-18. The shaft 2 8 isarranged to .be rotated-by'means-ot 4 hand-wheel :29 fixed .to a,.worm 30. Whlch meshes with a -w0rm wheel .31 fasten the shaft 28.

In use, the .table -isadjusted by;1 nean's'.of

he ght, and

the hand wheel 29 to. thedesired v 18. The table toli .19 is provided with rollers '20 and 21 which onthe outer side of-'the end members 16 and the work'is laid upon the-tabletop. 19.'---

Power being communicated tothedrive jtlvely far apart.

ley 5,,the belt 15 is rapidly moved over the I work with the sanded side toward the Work. By means of a hand block 32 of any suit- .able'form, the operator depresses the belt moving the- 15 into contact with the work, hand block longitudinallv of the belt and shifting the table top transversely of the belt as may be necessaryvto bring the belt intocontactiwith all portions of the work.

The pulleys 7 and 8 are supported rela- V The portion of the belt extending between said pulleys is thus com paratix'ely long and therefore flexible and may be readily depressed into contact with the work and also flexed transversely into contact with curved surfaces, Being structurally independent of the remainder of the machine framework, the table is not affected by vibrations or stresses set up in the pedestals 1 and 2, and may be constructed as substantially as may seem desirable. Thus the parts of the table do not get out of alinement. and the table top rolls freely back and forth upon the rails 22 and-23.

In Witness whereof, I'hei'eb maehao I claim as my invention:

In a belt sander, the combination of two pedestals which are structlmallyjndependent of each other, a pair nd-bel tdarrying pulleys on each of said pedestals, a sand belt running over all .four of said pulleys, the two upper pulleys being arranged to maintain the upper run of said in an elevated position so as to be out of the Way of .the operator and one of said upper pulleys being movable to take up slack in the belt, a drive pulley rigidly connected to one of the lower belt-carrying'fpiilleys;"and a Work-support which is pendent of said pedestals, being positioned 'wholly ofsaid belt.

#1 56th" are fl ns nature in the presence of witaessesj v CARL LAWRENCQ "1M;'A'i'rrrso1a Witnesses:

E. 'M. NELsON, W. L. BREDESEN.

wor -supp rt 

